所謂的wpf夸應用程序員會話保持和還原。其實就是將多個應用程序都用的資源保存到一個獨立的文件存儲系統中。這個應用程序退出的時候將數據寫入文件中，其他應用程序使用的時候可以去讀取這個文件

這個地方用到了System.IO.IsolatedStorage。這個方法只是為了避免讀寫文件操作的時候可能遇到的權限問題。其他的內容就是簡單的文件讀寫了

<Application xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="SDKSample.App" StartupUri="MainWindow.xaml" Startup="App_Startup" Exit="App_Exit"></Application>

//后臺cs代碼
using System.Windows; // Application, StartupEventArgs
using System.IO; // StreamReader, FileMode
using System.IO.IsolatedStorage; // IsolatedStorageFile, IsolatedStorageFileStream

namespace SDKSample
{
??? public partial class App : Application
??? {
??????? string filename = "App.txt";
private void App_Startup(object sender, StartupEventArgs e)
{
??? // Restore application-scope property from isolated storage
??? IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForDomain();
??? try
??? {
??????? using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream(filename, FileMode.Open, storage))
??????? using (StreamReader reader = new StreamReader(stream))
??????? {
??????????? // Restore each application-scope property individually
??????????? while (!reader.EndOfStream)
??????????? {
??????????????? string[] keyValue = reader.ReadLine().Split(new char[] {','});
??????????????? this.Properties[keyValue[0]] = keyValue[1];
??????????? }
??????? }
??? }
??? catch (FileNotFoundException ex)
??? {
??????? // Handle when file is not found in isolated storage:
??????? // * When the first application session
??????? // * When file has been deleted

??????????? }
??????? }

??????? private void App_Exit(object sender, ExitEventArgs e)
??????? {
??????????? // Persist application-scope property to isolated storage
??????????? IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForDomain();
??????????? using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream(filename, FileMode.Create, storage))
??????????? using (StreamWriter writer = new StreamWriter(stream))
??????????? {
??????????????? // Persist each application-scope property individually
??????????????? foreach (string key in this.Properties.Keys)
??????????????? {
??????????????????? writer.WriteLine("{0},{1}", key, this.Properties[key]);
??????????????? }
??????????? }
??????? }
??? }
}

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轉載于:https://www.cnblogs.com/zjypp/archive/2010/02/23/2319381.html

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